Plate Tectonics Shaping Our World (OCR GCSE Geography B (Geography for Enquiring Minds)): Flashcards
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Four main layers of Earth (outer to inner)
Four main layers of Earth (outer to inner)
Crust, mantle, outer core (liquid), inner core (solid)
What is the lithosphere?
What is the lithosphere?
Rigid outer layer: crust + uppermost mantle
Oceanic crust vs continental crust
Oceanic crust vs continental crust
Oceanic is thinner and denser than continental
Three processes causing plate movement
Three processes causing plate movement
Convection currents, ridge push, slab pull
Most powerful force driving plate movement
Most powerful force driving plate movement
Slab pull
Constructive boundary - plate movement
Constructive boundary - plate movement
Plates move apart, magma rises, forms new crust
Destructive boundary - plate movement
Destructive boundary - plate movement
Plates move together, subduction occurs, forms volcanoes
Conservative boundary - plate movement
Conservative boundary - plate movement
Plates slide past each other horizontally
Collision boundary - tectonic activity
Collision boundary - tectonic activity
Earthquakes YES, volcanoes NO, forms fold mountains
Ring of Fire statistics
Ring of Fire statistics
75% of world's volcanoes, 90% of world's earthquakes